In every field research pursuits promote systematic and gradual advancement of knowledge but discoveries are rare because

In every field research pursuits promote systematic and gradual advancement of knowledge but discoveries are rare because

Options:

A) Research Is A Continuous Critical Investigation
B) It Is Not Common To Be Able To Think Beyond A Grooved Channel
C) Sustained Experimental Work Needed For Discoveries Is Not Easily Forthcoming
D) Most People Lack Depth Of Knowledge Needed For It